$sin\left(6-7x^2\right)\cdot sin\left(6-7x^2\right)$
$-10a+38$
$\left(x+6\right)\left(x^2+2x+7\right)$
$37\cdot34$
$\frac{x^5+2x^2}{x-1}$
$y^2-5y=6$
$\frac{7}{x+2}\ge\frac{1}{x+2}$
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